.NET

Question 1

Question

Which of the following are value types? (Choose 3)

Answer

Decimal
String
System.Drawing.Point
Integer

Question 2

Question

Which is the correct declaration for a nullable integer?

Answer

Nullable(int) i = null;
Nullable<int> i = null;
int i = null;
int<Nullable> i = null;

Question 3

Question

Which of the following are reference types? (Choose 2)

Answer

Types declared Nullable
String
Exception
All types derived from System.Object

Question 4

Question

What is the correct order for catch clauses when handling different exception types?

Answer

Most general to most specific
Most likely to occur to least likely to occur
Most specific to most general
Least likely to occur to most likely to occur

Question 5

Question

The following scenarios, which would be a good reason to use the String- Builder class instead of the String class?

Answer

When building a string from shorter strings
When working with text data longer than 256 bytes
When you want to search and replace the contents of a string
When a string is a value type

Question 6

Question

Why should you close and dispose of resources in a finally block instead of a catch block?

Answer

It keeps you from having to repeat the operation in each catch.
A finally block runs whether or not an exception occurs.
The compiler throws an error if resources are not disposed of in the finally block.
You cannot dispose of resources in a catch block.

Question 7

Question

You create an application with built-in exception handling. For some types of exceptions, you want to add an event to the Event Log that specifies the line of code that initiated the exception. Which Exception property should you use?

Answer

Message
StackTrace
Source
Data

Question 8

Question

You pass a value-type variable into a procedure as an argument. The procedure changes the variable; however, when the procedure returns, the variable has not changed. What happened?

Answer

The variable was not initialized before it was passed in.
Passing a value type into a procedure creates a copy of the data.
The variable was redeclared within the procedure level.
The procedure handled the variable as a reference.

Question 9

Question

Which of the following statements are true? (Choose 2)

Answer

Inheritance defines a contract between types.
Interfaces define a contract between types.
Inheritance derives a type from a base type.
Interfaces derive a type from a base type.

Question 10

Question

Which of the following are examples of built-in generic types? (Choose 2)

Answer

Nullable
Boolean
EventHandler
System.Drawing.Point

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	Created by Aidos Baktaev over 6 years ago